Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque

Author(s)
Lauer, Viktor; Schneider, Michael; Meyer, Thomas; Bracher, Thomas; Pirro, Philipp; ... Show more
Thumbnail
DownloadRoss_Temporal evolution.pdf (958.3Kb)
OPEN_ACCESS_POLICY
Terms of use
Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/
Metadata
Show full item record
Abstract
The temporal evolution of pulsed spin Hall effect-spin transfer torque (SHE-STT) driven auto-oscillations in a yttrium iron garnet (YIG)-platinum (Pt) microdisk is studied experimentally using time-resolved Brillouin light scattering spectroscopy. The frequency of the auto-oscillations is different in the center when compared to the edge of the disk and is related to the simultaneous STT excitation of a bullet and a non-localized spin-wave mode. Furthermore, the magnetization precession intensity saturates on a time scale of 20 ns or longer, depending on the current density. For this reason, our findings suggest that a proper ratio between the current and the pulse duration is of crucial importance for future STT-based devices.
Date issued
2017-01
URI
http://hdl.handle.net/1721.1/111944
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
IEEE Magnetics Letters
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Lauer, Viktor et al. “Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque.” IEEE Magnetics Letters 8 (2017): 1–4. © 2017 EU
Version: Original manuscript
ISSN
1949-307X
1949-3088
Collections